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Cro repressor in the absence (5cro) and presence of DNA (6cro) from bacteriophage lambda

• What structural elements are present in the protein?
• What is the subunit composition?
• What is the distance between protein and DNA?
• What comparisons can be made between the two structures?

Ohlendorf, D. H., D. E. Tronrud, and B. W. Matthews. 1998. Refined structure of Cro repressor protein from bacteriophage lambda suggests both flexibility and plasticity. J. Mol. Biol. 280:129-136.

Albright, R. A., and B. W. Matthews. 1998. Crystal structure of lambda-Cro bound to a consensus operator at 3.0 Å resolution. J. Mol. Biol. 280:137-151.

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